show an error message box if no accessible devices are found on program launch

svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1250081

src/main.cpp

@@ -51,6 +51,9 @@ int main(int argc, char* argv[])
 	if (!loadBackend())
 		return 0;
 
+	if (!checkAccessibleDevices())
+		return 0;
+	
 	MainWindow* mainWindow = new MainWindow();
 	mainWindow->show();
 

src/util/helpers.cpp

@@ -203,6 +203,20 @@ bool loadBackend()
 	return true;
 }
 
+bool checkAccessibleDevices()
+{
+	if (getSolidDeviceList().empty())
+	{
+		KMessageBox::error(NULL,
+			i18nc("@info", "<para>No usable devices could be found.</para><para>Make sure you have sufficient "
+				"privileges to access block devices on your system.</para>"),
+			i18nc("@title:window", "Error: No Usable Devices Found"));
+		return false;
+	}
+	
+	return true;
+}
+
 QList<Solid::Device> getSolidDeviceList()
 {
 	QString predicate = "StorageDrive.driveType == 'HardDisk'";
@@ -229,7 +243,5 @@ QList<Solid::Device> getSolidDeviceList()
 		predicate += ']';
 	}
 
-	kDebug() << predicate;
-
 	return Solid::Device::listFromQuery(predicate);
 }

src/util/helpers.h

@@ -52,4 +52,6 @@ LIBPARTITIONMANAGERPRIVATE_EXPORT bool loadBackend();
 
 LIBPARTITIONMANAGERPRIVATE_EXPORT QList<Solid::Device> getSolidDeviceList();
 
+LIBPARTITIONMANAGERPRIVATE_EXPORT bool checkAccessibleDevices();
+
 #endif